POP3 Internet E-Mail / BM
Hello,
in my test environment I have a GW 7 SP1 server via static NAT behind a BM
3.8 server. I want to allow a few users to check their internet POP3 E-Mails
with the GW-Client. I opened filters for SMTP and I need to add an exception
for POP3 now. But, do I have to add a POP3 exception for any address or only
for the GW server (192.168.A.B)?
Do I also have to add Port 53 for DNS for these workstation or is it only
nessesary for the GW server?
Thanks for your answer and suggestions.
Regards
Mirko
Hallo Cat,
thanks for your answer. I guess I have a major issue here. Maybe you could
help...
I made all filter exceptions exactly as you (or Craig's book) suggested, but
receiving emails from an internet email account still don't work. GW-Client
ended up with a "Service not available" message and Outlook Express ended up
with a POP3 error message. I attached a file that shows the general filters
made by me (for information 192.168.13.14 is the Mailserver) except the
POP3 filters you suggested.
Because Outlook Express is not receiving a POP3 email from an internet mail
account even when ipflt is not loaded, I assume that it can't be a filter
problem. So I tested some major things: Again, pinging an IP from a
workstation is not possible (because of proxy, I guess). A nslookup from a
workstation to an internet address is possible, because of the DNS forward
from my internal DNS server to my ISP's DNS server (which made by the
dns/udp-st filter of the attached filter list). So far so good.
But I have to idea why, even under Outlook with no filters loaded POP3 is
still not possible... Do you have an idea?
Regards
Mirko
"Caterina Luppi" <[email protected]> schrieb im Newsbeitrag
news:[email protected]...
> Mirko,
>
>> in my test environment I have a GW 7 SP1 server via static NAT behind a
>> BM
>> 3.8 server. I want to allow a few users to check their internet POP3
>> E-Mails
>> with the GW-Client. I opened filters for SMTP and I need to add an
>> exception
>> for POP3 now. But, do I have to add a POP3 exception for any address or
>> only
>> for the GW server (192.168.A.B)?
>
> If these users are going to contact an external pop server (for
> instance, gmail) then the GW server isn't involved at all. You will only
> need an exception for SMTP and POP3 for the IP addresses of the
> workstations of these users.
>
> the exceptions you need are the following:
>
> packet type: TCP source port 1024-65535 dest port 110 STATEFUL
> source interface: private
> dest interface: public
> Source IP: the Ip address of the workstation
> DEst IP: the IP address of the POP3 server
>
> packet type: TCP source port 1024-65535 dest port 25 STATEFUL
> source interface: private
> dest interface: public
> Source IP: the Ip address of the workstation
> DEst IP: the IP address of the SMTP server
>
>> Do I also have to add Port 53 for DNS for these workstation or is it only
>> nessesary for the GW server?
>
> if you don't have an internal DNS server that can resolve external Ip
> addresses you will also need an exception for DNS, again, for the Ip
> address of the workstations. This is the exception:
>
> packet type: UDP source port 1024-65535 dest port 53 STATEFUL
> source interface: private
> dest interface: public
> Source IP: the Ip address of the workstation
> DEst IP: the IP address of the SMTP server
>
> Hope this helps.
>
> --
> Cat
> NSC Volunteer Sysop
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